Rosemont plans to operate within the intent of Pima County Outdoor Lighting Code as long as mine safety and operations is not compromised. The entire mine site is regulated by the Mine Safety and Health Act (MSHA), which establishes requirements for providing mine workers with a safe and healthy working environment. This includes roadways, parking lots, mine process areas, the mine pit, entry road, and Leach pads.
M3 Engineering and Technology Corporation. 2009. Rosemont Mine Outdoor Lighting and Pima County Outdoor Lighting Code Technical Memo. M3-PN08036. Prepared for Rosemont Copper Company. Tucson, Arizona.